WBPWDTE/EE/BED/NIQ_39/Q of 2025-26

Amount

Dismantling & disconnection of HT & LT cables / copper bars for repairing of defective 250 KVA transformers from its original position (For Transformer-1)

Washing the transformer core and copper windings carefully and cleaning the cores by soft brush and soft cotton clothes and the cores & winding should be cleaned properly to spray hot oil into the transformer under vacuum in the insulation to “flash off” and dry the transformer with the help of mechanical vacuum pump for de-moisturize and raise the IR value as per direction of EIC (For Transformer-1 & 2)

Rewinding of 250 KVA Dry type Transformer with the LT/HT coils 10 nos of with copper wire and required appx 65.30 kg of copper wire with maintain the number of turns of winding on the core, uses the nomex insulating materials and re assembling the HT/LT coils and dry method uses in the form of vacuum impregnation with a solvent type varnish on a completed assembly consisting of the core and the coils or individual primary and secondary coils and dipping the core and the coils in varnish and placing the coils in position with proper gauge nomex plate, papers, flims, seperators incl. other insulating materials etc etc to complete the same and to make in original formation and both the HT and LT coils in heat chamber for several hours to get satisfactory result of IR value as requirement and to provide the proper support to the windings and both the windings are mounted on the core and maintain flux linkage between primary & secondary windings to complete the job as per direction of EIC (For Transformer-1)

Charges of various test of 250 KVA Dry type Transformer winding resistance, voltage ratio etc as per requirement at the works as per direction of EIC (For Transformer-1)

Installation of the 250 KVA Dry type Transformer after repairing as per direction of EIC (For Transformer-1)

Reconnection of the HT & LT cables / copper bars etc to its original position with the expert technician with the co’s own tools & tackles at site to complete the job as per direction of EIC (For Transformer-1)

Transportation charge for carrying Shawl-ballah, chain-pulley, wooden-block, testing machine, HT meter, tools & tackles etc. from Company workshop to site and return back from site to Company workshop incl. loading unloading on both side as per requirement (For Transformer-1)

Cleaning. Servicing and testing of folowing 11KV 800 Amp rated 3 Panel HT switch gear with the expert technician with the co's own tools & tackles and testing with High Voltage Testing Machine at site to complete the total Cleaning. Servicing, testing work as per direction of EIC a) Servicing, cleaning, checking, testing of 11 KV HT switch gear, CT/PT.Relays Measurement & protection system. b) AC & DC Control circuit to be checked thoroughly. c) Cleaning. Servicing, & testing of 11KV HT switch gear d) Servicing & testing of Current Transformer. e) Servicing & testing of Potential Transformer 1) Servicing. Testing of Over current. Earth fault. & IDMT Relays & all auxiliary relays g) Insulation Resistance (IR) of cables/Breaker h) Tighten of all bus bar/support. i) All live terminal are properly tighten & covered. j) Checking of Induction Circuit k) Cleanness & dryness of the panel l) Breaker tripping system checked. m) Breaker's contact resistance test n) Over current/tripping test. o) Earth fault/tripping test p) Testing of breaker tripping by mechanically ON/OFF of breaker switch etc q) Thoroughly checking before feeding power to Panel (1 Incoming & 2 Outgoing)

Supply and installation of transformer protection relay (model – TR7570) MAKE PECON ELECTRONICS/APPROVE MAKE, including ness connection with HT breaker and other work as per direction of EIC

Supply & fixing of Air Circular 600MM 1420 RPM, 4 blade (Make- Crompton/EPC) in wall (Transformer room) with 2.5sqmm wire and PVC rigid conduit approx 3 mtr as per direction of EIC

Supplying and fixing Timer box 10way SPNDB fixed in wall on flate iron frame as per direction EIC. The Box shuld comprising following accessorise. A) 230 V, 50 Hz, 16 Amp Single dial 1 x 24 Hrs. Timer similar to (Microrex QT31) of quartz driven running reserve Day dial back up by nickle cadmium battery (Make GEC/Legrand)- 1 по B) One no. MNX25 2P (Make Legrand/L&T)-1 no C) Double pole 32 Amps MCB (L&T/Legrand) - 1 no D) Auto/Manual By pass Toggle Switch arrangement 1 no. E) 250 V, Diode type neon Indicator lamp (Make Legrand /L&T)- 1 no F) Bakelite base with FP bolt type stud/Terminal block incl S & F Neutral Bar, with spring washer, nuts etc with this box for termination of power to complete arrangement must be wiring by 4 Sq mm PVC insulated Cu wire with suitable length incl socketing/lugs etc as per requirement & direction of EIC (for controlling outdoor street light fittings) (Make Legrand /L & T/Crabtree)

GENUINE ENGINEERING WORKS (BID ID -7571817)

DURGAPUR POWER (BID ID -7550391)